OMAPL138如何在Linux下使用EDMA3驱动

yyj

( D% a" M* r* g5 o

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   * }5 e* q! W' Y# o
4. *
   ! K- G5 c, {0 x# B
5. * brief  EDMA3 Test Application
   0 ?& j$ N. G; d" W1 L* |
6. *
   - e. H, f0 O2 [/ J+ P4 ^2 k
7. *   This file contains EDMA3 Test code.
   ( Y8 }# o9 U- T1 x; i" Y' g, Q& z
8. *
   . U" f! F: N$ @* F2 R: k* ?  `4 f; X
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    ) F; D, p0 M) t; g  V3 o! b) l% R4 J1 {
11. *         TO CHANGE.
    , u! Z0 s9 S8 V9 o9 R
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    ) h* D: ~, T7 o. X5 d% J$ l; X3 Y& ^5 j
15. * This program is free software; you can redistribute it and/or
    
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    9 F; S& n0 q# S! [
18. *
    : p# w! e  W/ B7 Q! y- g0 h
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    ; z+ }9 _. D6 l0 K' b
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    " U& Y/ y: ?+ X7 m2 W  e, h+ U
22. * GNU General Public License for more details.
      o% P: S: G- ?8 k; [
23. */
    ; m) X. I! h, C3 t' y1 r4 \# L
24. 
    4 U  P9 r6 Q7 @) c  E
25. #include <linux/module.h>
    5 Y- u) x& Z2 h3 B- X
26. #include <linux/init.h>
    ( b+ M. K% r6 T  o5 U0 {5 P/ \
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    # N) _/ x! D5 F9 T
29. #include <linux/interrupt.h>
    ; c/ e" x4 e5 P9 n0 ~  H
30. #include <asm/io.h>
    * N0 [) K2 M+ V6 Q# U5 z# A1 R
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    8 v8 |) u8 i  Z% t* `: E; ?
34. #include <linux/dma-mapping.h>
    / Z6 X, ]: T3 ?  t. I9 D3 c. u
35. 
    
36. #include <mach/memory.h>
    9 @8 _& f+ a+ U" R1 N6 @- S6 t
37. #include <mach/hardware.h>
    ! W/ x) w, ~2 a- U& W+ |' f6 r& o( q
38. #include <mach/irqs.h>
    : O" j! y: c1 W% w; b' P/ B# q% E. a
39. #include <asm/hardware/edma.h>
      W* ]2 B( X2 O( R* S6 t0 ~, t6 w" v
40. 
    7 z( D) v$ N: {5 j) e- b0 A3 i
41. #undef EDMA3_DEBUG
    : O$ b+ _2 D" j- u
42. /*#define EDMA3_DEBUG*/
    
43. 
    $ Q% P/ P5 I9 a% `
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    / V" O8 F# l. a/ s7 r& {! T, B: J7 j
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    1 K; Q/ a: L  a/ z. v9 e& n6 O
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    # t" I  s. F1 C; C8 s1 p5 u
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    , Q: Y# }0 h: V! r
56. #define TCINTEN_SHIFT               20
    & B3 T5 h5 ~9 K! ]8 y  O% a5 P  Z7 w
57. #define ITCINTEN_SHIFT              21
    3 T0 e7 Y+ a+ a5 B5 J- j
58. #define TCCHEN_SHIFT                22
      x% M) [  [+ ?
59. #define ITCCHEN_SHIFT               23
    * K; \( J" |' w
60. 
    
61. static volatile int irqraised1 = 0;
    8 ~: u8 b- h$ X- i8 R& O
62. static volatile int irqraised2 = 0;
    9 }% e7 g6 Q3 k* j
63. 
    9 s1 `# G; z" R0 |  L- J
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    ! c  [& ~, b) b0 I  W# O
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    - s4 ^3 p4 q) p% g' u5 |
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    ) _: a6 b% I9 `- t! }( _
76. char *dmabufdest2 = NULL;
    2 v! d1 g  E# D& @3 F
77. 
    
78. static int acnt = 512;
    9 x7 L! F: W+ J4 D4 B  o. h& c
79. static int bcnt = 8;
    1 V3 ^% C3 m. `2 y
80. static int ccnt = 8;
    ; e2 D0 g( F; g! j
81. 
    
82. module_param(acnt, int, S_IRUGO);
    3 J' i; Y  G) N; C* b, c5 S" y" w
83. module_param(bcnt, int, S_IRUGO);
    3 R& {0 U7 Q4 k2 n
84. module_param(ccnt, int, S_IRUGO);

复制代码

      这是在TI上找到的一个针对Davanci处理器简单的EDMA3驱动程序测试例程的一部分，我在编译的过程中是用
7 w7 c1 w6 r! \" k9 ~6 v% [arm-none-linux-gnueabi-gcc  -I /home/tl/omapl138/linux-3.3/arch/arm/include -I /home/tl/omapl138/linux-3.3/include  EDMA3test.cpp -o EDMA3这个命令来链接库文件进行编译，但是报的错误特别多，我又试着一个函数一个函数往进加，仍然是很多错误。
     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。

5 Z; V7 @3 A' y# j2 ^; L& z0 {- J/ V; Y